Kaspersky Total Security version 21.3.10.391 for Windows is an all-in-one protection suite designed to provide comprehensive defense against malware, ransomware, and online privacy threats. As of 2026, while this version remains functional on many systems, Kaspersky has transitioned its core consumer offerings to a new tiered structure (Standard, Plus, and Premium) with updated interfaces. Core Security Capabilities
- File encryption, secure backup, file shredder.
- Example: create an encrypted container for sensitive documents and schedule backups.
interface for its familiarity and robust feature set. Version 21.3.10.391 is a stable, "Goldilocks" version for those on older Windows hardware who need high-end protection without the overhead of the newest cloud-heavy versions.
- Local external drives
- FTP servers
- Kaspersky Cloud Storage (2GB included free with subscription)
"Kaspersky Total Security 2021 (version 21.3.10.391) for Windows – comprehensive multi-device security including antivirus, VPN, password manager, and parental controls."
This version introduced several critical performance and usability enhancements tailored for Windows 10 and early Windows 11 environments:
2. Key Features (At Time of Release)
This version was marketed as a comprehensive "digital lifestyle" protection suite. Key capabilities included:
(Maintenance Release 3) is a significant update in this product line, introducing critical compatibility and functional improvements. Key Features and Improvements in Version 21.3.10.391
Webcam Protection: Alerts you if an app tries to use your camera. 👨👩👧👦 Features for the Modern Home